Improved wheel-dressing machine



NITnD STATES l ATENT Ormea.,

-HIRAM S. JACOBS, OF PORTLAND, OREGON.

AIIVIFFLOVED WH EEL-DPLESSIN'G MACHINE.

Specification forming part of Letters Patent No. 410,004, dated September' l5, 1863.

vTo all whom t may concern:

exa-ct description of the same, reference being had to the accompanying drawings, making part of this specification, vin which- Figure l is a plan or top view of my im-v proved machine. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical section` of the same in the line a Fig. l. Fig. et is a vertical section in the line y y, Fig. l. l `ig.v5 is 'a section of a portion of the same taken in the line z z, Fig. 1. Fig. G is a plan of that porA tion of the mechanism ofwhich Fig. 5 is a section. Fig. 7 is avertical section taken in the .line w w, Fig. l.

The nature of my said invention consists,

ifirst, in a peculiar device for securing or chucking the wheel; second, in means for dressing the rim ofthe wheel; third, in means for reaming the hub; fourth, in a provision, for adapting the machine to operate on wheels of any size; lifth, in means for dressing the face and back of the rim to any desired bevels.`

In order that others skilled in the art to which my invention appertains may be enabled to fully understand and use the same, I will proceed to describe its construction and operation.

A A represent various parts ot' a strong frame, in which the several operating parts ot' the machine are to be supported and run.

B represents a hollow shaft, which is journaled in the cross-pieces B B. On theinner end of this shaft B a concave faceplate or chuck, C, is keyed so as to revolve therewith.

D represents one of a series of th amb-screws, each working upon the screw-threaded shank ofa strong metallic hook or clamp, D, passing through corresponding orifices in the rim of the face plate, C.

B2 represents a pin employed to center the wheel, (shown by red lines in Fig. 2,) and adapted to slide longitudinally within the hollow shaft B, for the purpose to be hereinafter explained. The end b of the pin B2 is caused to project beyond the inner end of the shaft B when said screw is not held bythe set-screw b by a spiral spring, b2. The screw b serves to firmly hold the pin B2 in its forward position while a wheel is being adjusted and secured tolthe face-plate.

E represents a drum secured to a hollow shaft, e, which is journaled in the standards A A', risingfrom the frame A. To each end of the' hollow shaft e is secured a pulley, E E2, on the outside of the standards A. fis a shaft running within the hollow shaft e, and carrying at eachend a pulley, F F.

F2 is a loose pulley turning on the shaftf, between 'the pulleys F and E.

Gris a sliding table running in guideways G', of segmental form, concentric with the drum E. Upon the said table are mounted rotary cutters H H2 HS, alldriven by belts e e2 e3 from the drum E through the medium of drums h It? h3 on the shafts of the said cutters. rIhe side cutters, H H2, are employed to dress the face and back ofthe wheel-rim, and to adapt them for rims of various thickness are made adjustable in their distance asunder by means of crank-screws h1 h4 moving the cutter frames back and forth in guideways h5. The said guideways are also made adjustable on a vertical axis by means of segmental slots and clamp-screws h6,.in order to ada-pt the cutters to dress the front and back of the wheel independently to any desired bevels. `The cutter H3 is employed to dress the tread of the rim, and has a circular adjustment by like-means with the face and back cutters, El H2. The action ofthe cutters upon the wheel is clearly illustrated in the vertical sectional view, Fig. 5, and by the horizontal section, Fig. 6, the rim of the wheel being shown in red.

The table G may be moved in either direction to place the cutters in contact with the rim ot' the wheel and remove them therefrom by means of acrank-shaft, I, bevelpinions t' i', transverse shaft I', pinion J, and rackj, or by a screw and pivoted nut, or by other suitable means.

Motion is communicated to the hollow shaft B of the face-plate (l by a belt, K, from the pulley E?, workingon a pulley, k, on the shaft 7c', and acting through a suit of diminishing Wheels k2 k3 k* h5, so as to impart a slow rotary motion to the face-plate and the wheel A secured thereto while the cutters are rapidly' rotated. The said gearing k2 k3 751765 Works in a sliding frame, K2, which may be ucved in either direction by a lever, L, and rack and pinion l to throw the pinion R5 into or out of gear with the wheel b3 on the hollow shaft B.

b4 is a second cogwheel on the hollow shaft B,which receives motion from the pulley F of the center shaftf, through a band,f, pu1ley F3, and pinion f2, when it is necessary to rotate the wheel at a higher velocity for the purpose of' reaming the hub.

M represents the reainer fixed in a stock, N, adapted to slide in guideways n a, and advanced or retracted by a rack and pinion, o, or other suitable means.

P may represent the main drivin g-loelt.

Operation: The wheel is centered upon the face-plate by means of the pin B2, and is then secured in correct position by the clamp-hooks D. The driving-belt P being placed upon the pulley Ff, as shown in Fig. 3, motion is communicated to the drum E, and thereby to the cutters H H2 H3, the said cutters having been set to the required distance and angles. The pinion h5 being then thrown into gear with the wheel b3, a slow rotary motion is communicated to the wheel clamped upon the face-plate. The tableG is then drawn forward in manner already explained, in order to place the cutters in contact with the rim ot' the wheel, and the latter is dressed oft' with rapidity and accuracy to the form required, a single revolution ofthe wheel suflicing to dress its rim. This done, the cutters are moved back and the reamer M,being advanced within the aperture in the'hub, the pinion R5 is again thrown out ot' gear and a more rapid motion imparted to the wheel by throwingthe drivingbeltj'l onto the pulley Fon the shaft f. By this means thehub is quickly reamed out, and, as its position upon the face-plate has not been changed, it follows, of necessity that the aperture formed in the hub t'or the reception ot' the boX must be accurately concentiic with the tread of the wheel. The sliding piu B recedes within the shaft B to admit the rcamer into the hub, and on the reamer being withdrawn the said pin is thrown out automatically by the spring b2 in position ready for centering another wheel.

lThe ways G being concentric with the drum E, the tension upon the belts @'62 ewill be the same in all positions of the table G, and hence the cutters will operate equally well upon a wheel of six feet in diameter, or one of two feet, or any required size.

It is well known that wheels are rarely made accurately true. For this rea-son the customary practice of chucking the wheel by the hub for nishing is objectionable and dit cult in application; whereas by my inode of clamping the wheel to the face-plate by hooks applied at a distance from the center of the wheel I am enabled to draw the wheel straight and, working by the faces of the spokes, impart a symmetrical form to wheels originally imperfect.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

l. The concave face-plate C, provided with a centering-pin,B2, and clamp-hooks D D', operating substantiall y as and for the purposes set forth.

2. The combination, with a suitable face plate,of the cutters Hl H2 H3, driven simultaneously by bands from a common drum, E, in the manner and for the purposes explained.

3. The reamer M, carried by an advancing and receding stock, N, in the described combination with the yielding center-pin B2, for the objects specied.

4. Incombination with' the cutters H H2B,

driven by beltsfrom a common drum, E, as explained, the sliding table G and segmental guides, by means of which the said outters may be adjusted in the are ofa circle concentric with the said drum, in order to adapt the machine to operate on wheels of any size.

5. In combination withcutters H H2 H3, operated substantially in the manner eX- plained, the use ot' guideways or bearings adjustable on vertical axes, in order to admin of dressing the face, back, and tread of the wheel to any required bevels.

H [RAM S. JACOBS.

Witnesses:

Oo'rAviUs KNIGHT, R. H. M AYHEw. 

